For Whom the Bell Tolls by Ernest Hemingway

High in the pine forests of the Spanish Sierra, a band of anti-fascist guerrilla prepares to blow up a strategically vital bridge. Robert Jordan, a young American volunteer, has been sent to handle the dynamiting. There, in the mountains, he finds the dangers and the intense comradeship of war. And there he discovers Maria, a young woman who has escaped from Francos rebel High in the pine forests of the Spanish Sierra, a band of anti-fascist guerrilla prepares to blow up a strategically vital bridge. Robert Jordan, a young American volunteer, has been sent to handle the dynamiting. There, in the mountains, he finds the dangers and the intense comradeship of war. And there he discovers Maria, a young woman who has escaped from Francos rebels.